20523244171 has 8 divisors (see below), whose sum is σ = 21031466400. Its totient is φ = 20015386560.

The previous prime is 20523244139. The next prime is 20523244211. The reversal of 20523244171 is 17144232502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20523244171 - 2⁵ = 20523244139 is a prime.

It is a super-3 number, since 3×20523244171³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20523241171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24610 + ... + 204088.

It is an arithmetic number, because the mean of its divisors is an integer number (2628933300).

Almost surely, 2^20523244171 is an apocalyptic number.

20523244171 is a deficient number, since it is larger than the sum of its proper divisors (508222229).

20523244171 is a wasteful number, since it uses less digits than its factorization.

20523244171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182309.

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 20523244171 its reverse (17144232502), we get a palindrome (37667476673).

The spelling of 20523244171 in words is "twenty billion, five hundred twenty-three million, two hundred forty-four thousand, one hundred seventy-one".